package grape.controller;

import grape.domain.SysLog;
import grape.service.ISysLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Date;
//@Component
//@Aspect
public class LogAop {
    @Autowired
    private HttpServletRequest request;
    @Autowired
    private HttpServletResponse response;
    @Autowired
    private ISysLogService sysLogService;
    //开始时间
    private Date visitTime;
    //访问的类
    private Class clazz;
    //访问的方法
    private Method method;
    //前置通知  主要是获取开始时间，执行的类是哪一个，执行的是哪一个方法
    @Before("execution(* grape.controller.*.*(..))")
    public void doBefore(JoinPoint jp) throws NoSuchMethodException{
        visitTime = new Date();//当前时间就是开始访问的时间
        clazz = jp.getTarget().getClass();//具体要访问的类
        String methodName = jp.getSignature().getName();//获取访问的方法的名称
        Object[] args = jp.getArgs();//获取访问的方法的参数

        if(args == null || args.length==0){
            method = clazz.getMethod(methodName);
        }else {
            Class[] classArgs = new Class[args.length];
            for(int i=0;i<args.length;i++){
                classArgs[i] = args[i].getClass();
            }
            clazz.getMethod(methodName,classArgs);
        }
    }
    //后置通知
    @After("execution(* grape.controller.*.*(..))")
    public void doAfter(JoinPoint jp) throws Exception {
        long time = new Date().getTime() - visitTime.getTime(); //获取访问的时长

        String url = "";
        //获取url
        if (clazz != null && method != null && clazz != LogAop.class) {
            //1.获取类上的@RequestMapping("/")
            RequestMapping classAnnotation = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
            if (classAnnotation != null) {
                String[] classValue = classAnnotation.value();
                //2.获取方法上的@RequestMapping(xxx)
                RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);
                if (methodAnnotation != null) {
                    String[] methodValue = methodAnnotation.value();
                    url = classValue[0] + methodValue[0];

                    //获取访问的ip
                    String ip = request.getRemoteAddr();

                    //获取当前操作的用户
                    SecurityContext context = SecurityContextHolder.getContext();//从上下文中获了当前登录的用户
                    User user = (User) context.getAuthentication().getPrincipal();
                    String username = user.getUsername();

                    //将日志相关信息封装到SysLog对象
                    SysLog sysLog = new SysLog();
                    sysLog.setExecutionTime(time); //执行时长
                    sysLog.setIp(ip);
                    sysLog.setMethod("[类名] " + clazz.getName() + "[方法名] " + method.getName());
                    sysLog.setUrl(url);
                    sysLog.setUsername(username);
                    sysLog.setVisitTime(visitTime);

                    //调用Service完成操作
                    sysLogService.save(sysLog);
                }
            }
        }

    }
}
